win_ransom_Lockbit5

YARA detection rule by RussianPanda

Detects LockBit 5.0

rule win_ransom_Lockbit5 {
	meta:
		author = "RussianPanda"
		description = "Detects LockBit 5.0" 
		date = "9/15/2025"
    	hash = "7ea5afbc166c4e23498aa9747be81ceaf8dad90b8daa07a6e4644dc7c2277b82"
	strings:
		$s1 = {C6 41 0F 00 0F B6 ?? 33 ?? 89}
		$s2 = {0F B6 ?? 0F C1 ?? 18 31} 
		$s3 = {83 ?? 02 83 ?? 0F D0 84 ?? ?? 00 00 00}
		
	condition:
		all of ($s*) 
		and uint16(0) == 0x5A4D and filesize < 1MB
}

[[ currentRule.title && currentRule.title.length > 60 ? currentRule.title.slice(0, 60) + '…' : currentRule.title ]]

c4d8c2ae-1e51-4008-874a-628dae3490a2

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Executable code, not a declarative rule

This submission is arbitrary [[ currentRule.format ? currentRule.format.toUpperCase() : '' ]] code, not a declarative detection rule — review it as you would any script before running it, and note that it cannot be safely aggregated or auto-executed alongside YARA/Sigma/Suricata/CRS rules.

Rejected pattern present

[[ reason ]]

What does this mean?

Format & documentation suggestions

Not a security issue — this rule is valid and was accepted as-is. These are optional fields/conventions its own format recommends, mainly affecting its quality score and how well it documents itself for other reviewers.

[[ reason ]]

What do these messages mean?

[[ currentRule.title && currentRule.title.length > 60 ? currentRule.title.slice(0, 60) + '…' : currentRule.title ]]

[[ currentRule.title ]]

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